| 引用本文: | 张宇辉,段伟润,李天云.抑制局部放电信号中周期性窄带干扰的子空间重构方法[J].电力自动化设备,2017,37(7): |
| ZHANG Yuhui,DUAN Weirun,LI Tianyun.Subspace reconstruction to suppress periodic narrowband noises of partial discharge signals[J].Electric Power Automation Equipment,2017,37(7): |
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| 摘要: |
| 为有效提取局部放电信号，提出一种基于子空间重构的窄带干扰抑制方法。对局部放电信号数据形成的HANKEL矩阵进行奇异值分解，将信号划分为窄带干扰子空间和局部放电信号子空间。利用子空间数据重构窄带干扰波形，然后与原始数据相减，得到抑制干扰后的局部放电信号。该方法能在保证局部放电信号失真较小的同时有效去除窄带干扰，抗随机干扰能力较强。仿真和实测信号的处理结果验证了其有效性。 |
| 关键词: 局部放电 窄带干扰 子空间重构 奇异值分解 HANKEL矩阵 |
| DOI：10.16081/j.issn.1006-6047.2017.07.027 |
| 分类号:TM835 |
| 基金项目: |
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| Subspace reconstruction to suppress periodic narrowband noises of partial discharge signals |
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ZHANG Yuhui1, DUAN Weirun2, LI Tianyun1
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1.School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China;2.State Grid Tianjin Electric Power Company, Tianjin 300010, China
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| Abstract: |
| A method based on subspace reconstruction is proposed to suppress the periodic narrowband noises for extracting the effective PD(Partial Discharge) signals. Singular value decomposition is performed to divide the HANKEL matrix consisting of original PD data into the periodic narrowband noise subspace and the PD signal subspace. The data of periodic narrowband noise subspace are used to reconstruct the waveform of periodic narrowband noises, which is then subtracted from the original PD data. The proposed method, with better resistance to random interferences, can effectively filter out the periodic narrowband noises while ensure a smaller distortion of PD signals. Simulative and measured PD data are applied to verify its effectiveness. |
| Key words: partial discharge narrowband noise subspace reconstruction singular value decomposition HANKEL matrix |
